import java.io.*;
import java.util.*;

public class GameHelper {
	
	private static final String alphabet = "abcdefg";
	private int gridLength = 7;
	private int gridSize = 49;
	private int [] grid = new int [gridSize];
	private int comCount = 0;
	
	public String getUserInput(String prompt){
		String inputLine = null;
		System.out.print(prompt  + " ");
		try{
			BufferedReader is = new BufferedReader( new InputStreamReader(System.in));
			inputLine = is.readLine();
			if(inputLine.length() ==0) return null;
		}
		catch (IOException e){
			System.out.println("IOException " + e);
		}
		return inputLine.toLowerCase();
	}
	
	public ArrayList<String> placeDotCom(int comSize){
		ArrayList<String> alphaCells = new ArrayList<String>();
		String temp = null;
		int[] coords = new int[comSize];
		int attempts = 0;
		boolean success = false;
		int location = 0;
		
		comCount++;
		int incr = 1;
		if((comCount % 2) == 1){
			incr = gridLength;
		}
		
		while (!success & attempts++ < 200){
			location = (int)(Math.random() * gridSize);
			int x = 0;
			success = true;
			while(success && x< comSize){
				if(grid[location] == 0){
					coords[x++] = location;
					location += incr;
					if (location >= gridSize){
						success = false;
					}
					if(x>0 && (location % gridLength ==0)){
						success = false;
					}
				}
					else{
						success = false;
					}
				}
		}
 	
		int x=0;
		int row = 0;
		int column = 0;
		while(x<comSize){
			grid[coords[x]]=1;
			row = (int)(coords[x]/gridLength);
			column = coords[x] % gridLength;
			temp = String.valueOf(alphabet.charAt(column));
			
			alphaCells.add(temp.concat(Integer.toString(row)));
			x++;
		}
		return alphaCells;
		}
}